A design should fit the roof—not fight it
Usable roof area, shading, rooflights and safe access all shape the final layout.
Check the business and the certification
Confirm the legal business, contact details, installer certification and independent reviews. Follow profile links yourself rather than relying only on screenshots or badges copied into a proposal.
Ask who completes the survey, design, installation, electrical work, grid paperwork and aftercare, especially where subcontractors are involved.
Compare assumptions line by line
Look for roof orientation, shading, system size, expected generation, self-consumption, export, tariff and degradation assumptions. Savings figures cannot be compared responsibly when one quote hides the inputs.
The equipment schedule, access, roof work, electrical upgrades, monitoring, bird protection, certification and VAT treatment should be itemised or clearly described.
Understand what happens after acceptance
Ask about design confirmation, grid approval, deposits, programme, handover documents, workmanship cover, manufacturer warranties and who responds if monitoring or generation later appears wrong.
Common questions
- Should I choose the quote with the most panels?
- Not automatically. The layout should suit usable roof area, grid limits, consumption and the economics of self-use versus export.
- What should a solar quote include?
- At minimum, expect the proposed equipment, system size, design assumptions, estimated generation, installation scope, access, electrical work, certification, grid route, price and exclusions.